Metabolomics

Dataset Information

28

Untangling the wine metabolome by combining untargeted SMPE-GCxGC-TOF-MS and sensory analysis to profile Sauvignon blanc co-fermented with seven different yeasts


ABSTRACT: Saccharomyces cerevisiae (SC) is the main driver of alcoholic fermentation however for aroma and flavour formation in wine non-Saccharomyces species can have a powerful effect. This study aimed to compare untargeted volatile compound profiles from SPME-GCxGC-TOF-MS and sensory analysis data of Sauvignon blanc wine inoculated with six different non-Saccharomyces yeasts followed by SC. Torulaspora delbrueckii (TD), Lachancea thermotolerans (LT), Pichia kluyveri (PK) and Metschnikowia pulcherrima (MP) where commercial starter strains, while Candida zemplinina (CZ) and Kazachstania aerobia (KA), were isolated from wine grape environments. Each fermentation produced a distinct profile both sensorially and chemically. SC and CZ were the most distinct in both of these cases. SC had guava, grapefruit, banana, and pineapple aromas while CZ was driven by fermented apple, dried peach/apricot, and stewed fruit as well as sour flavor. Chemically over 300 unique features were identified as significantly different across the fermentations. SC had the highest number of esters in the highest relative concentration but all the yeasts had distinct ester profiles. CZ displayed the highest number of terpenes in high concentration but also produced a large amount of acetic acid. KA was high in ethyl acetate. TD had fewer esters but three distinctly higher thiol compounds. LT showed a relatively high number of increased acetate esters and certain terpenes. PK had some off odor compounds while the MP had high levels of different methyl butyl-, methyl propyl-, and phenethyl esters. Overall, this study gives a more detailed profile of these yeasts than anything previously reported.

INSTRUMENT(S): LECO Pegasus 4D GCxGC-TOF-MS

SUBMITTER: Margaret Whitener  

PROVIDER: MTBLS212 | MetaboLights | 2015-08-19

REPOSITORIES: MetaboLights

Dataset's files

Source:
Action DRS
MTBLS212 Other
CZ1_10s.cdf Other
CZ1_30m.cdf Other
CZ1_5m.cdf Other
CZ2_10s.cdf Other
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